JPH09101862A - Touch screen abnormality detection and operating frequency setting method - Google Patents

Abstract

(57) [Abstract] [Abstract] Anomaly detection by a frequency interference on a touch screen is accurately performed without relying on human judgment, and anomaly detection and operation frequency resetting are automatically repeated, thereby complicating human beings. Avoid doing work. SOLUTION: An operation confirmation screen is displayed so as to continue to specify one point on the touch screen for a predetermined period (1a), and DOWN.
It is stored as a reference point at the event (1b),
When a MOVE event occurs, its position and number of times are stored (1c), a coordinate difference from a reference point and an occurrence frequency are calculated after a predetermined time (1d), and it is determined whether both of them exceed a predetermined value (1e). , It is judged to be abnormal if it exceeds (1
f) Otherwise, it is determined to be normal (1g).
If it is abnormal, change the operating frequency (2c),
Reboot the system (2d) and process abnormality detection (2a)
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Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention detects a malfunction in a touch screen applied to an electronic device such as a computer in which recognized coordinates fluctuate even if the same position is continuously touched. Regarding the method.
It is considered that the cause is interference between the operating frequency of the touch screen and the scanning frequency of the CRT display,
The malfunction is resolved by resetting the operating frequency to a value that has less influence. The invention also relates to a method of setting this operating frequency.

[0002]

2. Description of the Related Art FIGS. 4 to 5 show a flow chart and a system configuration of a visual method as a first prior art. The mouse cursor in FIG. 4 is a mark displayed on the display to show the position on the screen, and is used, for example, to make the position touched on the touch screen visible. In this case, since the display position of the mouse cursor is determined based on the input coordinates, it is displayed at a position different from the actual touch position when the coordinates are erroneously recognized. Therefore, the mouse cursor when receiving frequency interference appears to alternate between a correct pointing position and an incorrect position due to a malfunction.

In the first prior art, a malfunction is detected by checking whether or not this reciprocating display is visible to the human eye. Also, when resetting the operating frequency, a person who detects an abnormality activates the operating frequency adjustment program to change the operating frequency, and visually confirms whether the operating frequency is normal. It was First, the abnormality of the mouse cursor is visually confirmed in process 4a, and the operating frequency adjustment program is started in process 4b. Select the operating frequency to be set in process 4c, and process 4d
Reboot the system for the settings to take effect.

A conventional system configuration will be described with reference to FIG. The display 51 displays an operation confirmation screen, the touch screen 52 has its operation frequency set by the controller 53, and information such as position coordinates as a result of the operation and whether or not the touch is performed is information from the mouse 54. 5 in the same format as
5 will be notified. In the main body 55, the touch screen 52
The touch screen driver 551 similarly processes information input from the mouse 54. When the operating frequency selected by the operating frequency adjustment program 552 is set in the controller 53, the touch screen 52 operates according to the operating frequency.

As a second conventional technique, a scanning signal of the display is detected by hardware separately from this, and the circuit is switched so that the operating frequency becomes 1 / n (n is an integer) of the frequency. There is also a method. This is configured to determine a target frequency from the scanning frequency measured by the measurement circuit, calculate which of the plurality of selectable additional capacitors should be selected, and select the circuit.

[0006]

However, in the first prior art, since a person makes a judgment at the time of detecting an abnormality and a judgment as to whether or not the apparatus is operating normally after adjustment, it is inaccurate due to individual differences. It was inevitable. Also, if the adjustment is not successful at one time, it is necessary to repeat the process of starting the program by specifying it, determining the frequency, and checking the result, which is a complicated task. was there.

In the second prior art, since the operating frequency is mechanically determined from the measured scanning frequency, whether or not a malfunction due to frequency interference actually occurs while the application program is running. , It has not verified at all whether the interference has been eliminated at the determined operating frequency. Further, there is a problem that extra hardware such as a scanning frequency measuring circuit and an arithmetic circuit for determining the additional capacitance is essential.

An object of the present invention is to correctly detect a malfunction due to frequency interference without adding hardware, and to easily reset the operating frequency when an abnormality is detected.

[0009]

The flowchart of the invention of the first item shown in FIG. 1 is for detecting an abnormality of the touch screen. According to the present invention, in the process 1a, the operation confirmation screen is displayed, the operator is instructed to continue touching any one point on the touch screen for a predetermined time, and in the process 1b, a DOWN event indicating that the touch point is started to be touched. With the occurrence of the above, the coordinate value of the touched point is stored as the coordinate of the reference point. M in processing 1c within a predetermined time
When an OVER event occurs, the occurrence position is stored every time and the number of occurrences is stored, and the coordinate difference between the position of the MOVE event and the reference point and the occurrence frequency are calculated after a predetermined time in process 1d. In process 1e, it is determined whether the coordinate difference and the occurrence frequency both exceed a predetermined value. If both exceed, the process 1f determines that there is an abnormality, and the process 1g determines that the condition is normal.

The flowchart of the second aspect of the invention shown in FIG. 2 is for resetting the operating frequency after the abnormality of the touch screen is detected. In the present invention, the abnormality is detected in the process 2a by the method described in the first item, and the presence or absence of the abnormality is determined from the result of the detection in the process 2b. If it is determined to be abnormal, the operating frequency of the touch screen is changed in process 2c, the system is restarted in process 2d to make the change effective, and the process returns to the process 2a for detecting abnormality.

[0011]

According to the present invention, a malfunction is accurately detected by continuously pointing a predetermined position on the touch screen and monitoring whether the coordinate of the pointing position fluctuates and is input during that time. When an abnormality is detected, the operating frequency for normal operation is automatically set by repeating the resetting to another settable operating frequency and the abnormality detection by the above method.

[0012]

EXAMPLE An example will be described with reference to FIGS.
1 is a flowchart of the invention of the first item, FIG. 2 is a flowchart of the invention of the second item, and FIG. 3 is a diagram showing a system configuration of the present invention. First, the system configuration will be described with reference to FIG.

FIG. 3 shows the system configuration of the present invention, which has the same hardware configuration as the conventional one. Controller 3 for controlling display 31 and touch screen 32
3, an input / output device such as a mouse 34 is connected to the main body 35. A touch screen driver 351 that processes information from the touch screen 32 and the mouse 34 is provided in the main body 35, and the operating frequency adjustment program 352 detects a malfunction and resets the operating frequency based on the information from the touch screen driver 351. Do.
When the operating frequency is set in the controller 33, the touch screen 32 operates according to the operating frequency.

FIG. 1 is a flowchart of the invention of the first item,
It shows the procedure of the abnormality detection processing. When the operating frequency adjustment program 352 is activated, an operation confirmation screen is first displayed on the display 31 in process 1a, and the operator is instructed to continue touching one point on the touch screen 32 for a predetermined time. When the operator follows this instruction, the controller 33 that recognizes the instruction notifies the touch screen driver 351 that some point on the touch screen 32 has started to be touched. Based on the information, the touch screen driver 351 determines the DOWN
Operation frequency adjustment program 3 that an event has occurred
52 is notified.

Here, the operating frequency adjusting program 352
Monitors the presence or absence of a MOVE event in process 1c for a predetermined time instructed by the operator. The MOVE event occurs when the coordinates of the designated point change. Even if the operator continues to touch the same point, if the false recognition of the input coordinates is repeated due to frequency interference, a MOVE event will occur every time there is a change between the actual touch position and the falsely recognized position. Occur. The present invention is intended to detect an abnormality by monitoring the occurrence of such a MOVE event. M in process 1d
The coordinate difference from the reference point at the time of the OVE event and the occurrence frequency are calculated, and this MOVE is calculated based on the coordinate difference and the frequency in process 1e.
Determine if the event is really due to a malfunction.

This is because the actual touch coordinates themselves slightly change due to camera shake even if the same point is touched, and the touch screen driver 351 moves the MOVE.
This is because an event may occur. In the case of frequency interference as compared with the case of camera shake, the movement distance of the recognition coordinates is large and the fluctuations occur frequently. Therefore, when the coordinate difference and the occurrence frequency exceed a predetermined value, it is abnormal in the process 1f. If not, the process 1g determines that the process is normal.

FIG. 2 is a flowchart of the invention of the second item,
It shows a procedure for setting an operating frequency. In the process 2a, the abnormality detection described in FIG. 1 is performed, and it is determined in the process 2b whether or not the result is abnormal. When an abnormality is detected, the operating frequency is changed in process 2c, and the system is restarted in process 2d to make the setting effective. After that, the process returns to the abnormality detection process of the process 2a, and the detection of frequency interference and the change of the operating frequency are repeated for all the settable operating frequencies until no abnormality is detected. Occurrence of frequency interference is determined by the combination of the scanning frequency of the display and the operating frequency of the touch screen. If you prepare several operating frequencies with extremely different frequencies, you can select one of them. It can be fully expected that there will be no interference at frequencies.

[0018]

As described above, according to the present invention, the frequency interference is automatically confirmed from the variation of the recognition coordinates when the same point is continuously touched, so that the accurate abnormality detection without individual difference can be performed. is there. Also, even if the adjustment is not successful at one time, the change of the operating frequency and the detection of the abnormality are automatically repeated, so that a human can specify and start the adjusting program, determine the operating frequency, and check the result. Instead of having to repeat a series of steps, you can simply touch the touch screen several times according to the displayed instructions and make adjustments.

Further, since the abnormality is detected by software based on the data of the actual display coordinates, the operating frequency can be set accurately without increasing the extra hardware. It should be noted that although the present invention certainly requires more labor than automatic adjustment by hardware, adjustment of the positional relationship between the display screen and the input coordinates is indispensable when using the touch screen. If it is done at the same time as a series of work at the time of proper alignment, there will be almost no problem even if the procedure is increased.

[Brief description of the drawings]

FIG. 1 is a diagram showing a flowchart of the invention of the first item.

FIG. 2 is a diagram showing a flowchart of the invention of the second item.

FIG. 3 is a diagram showing a system configuration of the present invention.

FIG. 4 is a diagram showing a flowchart of a conventional technique.

FIG. 5 is a diagram showing a system configuration of a conventional technique.

[Explanation of symbols]

 31 display 32 touch screen 33 controller 34 mouse 35 body 351 touch screen driver 352 operating frequency adjustment program

Claims (2)

[Claims] 1. A touch screen abnormality detection method, which displays an operation confirmation screen (1a) for instructing an operator to keep touching an arbitrary point on the touch screen for a predetermined time (1a). When the DOWN event indicating that the touch is started is triggered, the coordinate value of the touched point is stored as the coordinate of the reference point (1b), the MOVE event is waited for the predetermined time, and the MOVE event is waited for.
When an event occurs, the occurrence position is stored every time and the number of occurrences is stored (1c), and after the predetermined time, the coordinate difference between the occurrence position and the reference point and the occurrence frequency are calculated for the MOVE event. , (1d), it is determined whether the coordinate difference and the occurrence frequency both exceed a predetermined value (1e), and as a result of the determination (1e), it is abnormal when both the coordinate difference and the occurrence frequency exceed. Judge that there is (1
f) As a result of the determination (1e), it is determined to be normal (1g) when at least one of the coordinate difference and the occurrence frequency is not exceeded (1g), The touch screen abnormality detection method characterized by the above. 2. A touch screen operating frequency setting method, wherein abnormality detection is performed by the touch screen abnormality detection method (1a to 1g) according to claim 1 (2a), and whether there is an abnormality is detected from the result of the abnormality detection (2a). Judgment (2b), and if the judgment (2b) is abnormal, the operating frequency of the touch screen is changed to one of a plurality of predetermined frequencies (2c), and the operating frequency is changed ( The system is restarted under the environmental conditions set in 2c) (2d), and the abnormality detection process (2a)
Return to, touch screen operating frequency setting method, characterized in that.